27945563 has 2 divisors, whose sum is σ = 27945564. Its totient is φ = 27945562.

The previous prime is 27945551. The next prime is 27945607. The reversal of 27945563 is 36554972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27945563 - 2¹² = 27941467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27945563.

It is not a weakly prime, because it can be changed into another prime (27965563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13972781 + 13972782.

It is an arithmetic number, because the mean of its divisors is an integer number (13972782).

Almost surely, 2^27945563 is an apocalyptic number.

27945563 is a deficient number, since it is larger than the sum of its proper divisors (1).

27945563 is an equidigital number, since it uses as much as digits as its factorization.

27945563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 41.

The square root of 27945563 is about 5286.3563065688. The cubic root of 27945563 is about 303.4619804783.

The spelling of 27945563 in words is "twenty-seven million, nine hundred forty-five thousand, five hundred sixty-three".